Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-01-30
Astronomy and Astrophysics
Astrophysics
submitted to ApJ Letters, Figs. 1-3 included as JPEG
Scientific paper
10.1086/320499
Four compact ROSAT X-ray sources very close to the nearby ultraluminous
infrared galaxy Arp 220 (IC 4553) have been identified as medium-redshift QSOs.
The closest pair lying symmetrically across the galaxy have almost identical
redshifts z = 1.25, 1.26. All of the evidence suggests that these QSOs have
been ejected from Arp 220 and have large intrinsic redshifts.
Arp Halton C.
Burbidge Margaret. E.
Chu Yan-Yi
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